Q9 of 400 Page 167

What type of chemical bonds are present in a solid compound which has a high melting point, does not conduct electricity in the solid state but becomes a good conductor in the molten state ?

Ionic bonds are chemical bonds are present in a solid compound which has a high melting point, does not conduct electricity in the solid state but becomes a good conductor in the molten state.

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8 Write down the electronic configuration of

(i) magnesium atom, and


(ii) magnesium ion. (At. No. of Mg = 12)

 8 Write down the electronic configuration of

(i) sulphur atom, and


(ii) sulphide ion. (At. No. of S = 16)

 10 State whether the following statement is true or false:

The aqueous solution of an ionic compound conducts electricity because there are plenty of free electrons in the

 11 What type of bonds are present in hydrogen chloride and oxygen?